How to fix Duckduckgo in Searx 1.0.0？

[Plus-xu]

Version of Searx, commit number if you are using on master branch and stipulate if you forked Searx

Searx1.0.0(2022.06.06) a3ad9f9

How did you install Searx?

executing the searx/webapp.py file

What happened?

The latest version Searx and Searxng has some bugs, the results of non-english languages such as east-asian languages(Chinese, Japanese and Korean) in some engines were weird(#3258) , but the searx 1.0.0 is pefect.
The newest searx has fixed the Duckduckgo engine, but 1.0.0 can not use the new duckduckgo.py(9ba072b). how to fix duckduckgo in searx 1.0.0？
Thanks!

How To Reproduce

#3258
search in Searx 1.0.0 with Duckduckgo

Expected behavior

fix Duckduckgo in searx 1.0.0

Screenshots & Logs

Additional context